Laptop assistance settings hdd partition restore settings memory issues huawei matebook pro

I require an IT person that has experience to quickly come in do this basic work they will know how to resolve being 1- I played with partitioning a c:/ in storage and reduced c:/ resulting in a max hard drive unable to operate the laptop properly I have restored its a new laptop matebook pro x I require to move all data storage files to sit on my external drive and sync there drop box cloud storage onedrive I require that c:/ become much larger and reduce d:/ and let me know if outlook can sit there as I may have about 3ogbin mail.